directory-auto-compressor is a useful tool for compressing the specific directory automatic. It will try to check if the /src directory has changed from last time (rsync works). If changed , the /src will be compressed as as xxx.tar.gz file into the /output directory. The timer (crontab) is running every minute by default.

docker build -t zhouzhipeng/directory-auto-compressor .

# optional 
docker rm -f compressor-test

docker run -d --name compressor-test \
    -e FILE_PREFIX=test \
    -e CRON_EXPL="* * * * *" \
    -v ~/test:/src \
    -v ~/output:/output \
    zhouzhipeng/directory-auto-compressor